CN220454830U - Independent low-frequency double-sling segment model wind tunnel test device - Google Patents
Independent low-frequency double-sling segment model wind tunnel test device Download PDFInfo
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- CN220454830U CN220454830U CN202322184397.1U CN202322184397U CN220454830U CN 220454830 U CN220454830 U CN 220454830U CN 202322184397 U CN202322184397 U CN 202322184397U CN 220454830 U CN220454830 U CN 220454830U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
Abstract
The utility model relates to the technical field of long sling segment model wind tunnel tests of large-span suspension bridges, in particular to an independent low-frequency double sling segment model wind tunnel test device which comprises a top frame positioned at the top of a wind tunnel, and a first sling component and a second sling component which are suspended on the lower side of the top frame, wherein the sling component comprises a bottom frame connected with the top frame, a plurality of lifting ropes and a plurality of pairs of lifting rings, and two ends of each lifting rope are respectively connected with the top frame and the bottom frame through a pair of lifting rings. According to the wind tunnel test device for the double-sling segment model, provided by the utility model, the two bottom frames are respectively hung in the wind tunnel at the lower side of the top frame through the two groups of sling assemblies, and the two slings are respectively fixed on the two bottom frames, so that the independent hanging effect of the double slings is achieved, and the sling replaces a spring in a traditional elastic hanging system, so that the ultra-low frequency hanging and large-scale vibration of the segment model are realized.
Description
[ field of technology ]
The utility model relates to the technical field of long sling segment model wind tunnel tests of large-span suspension bridges, in particular to an independent low-frequency double sling segment model wind tunnel test device.
[ background Art ]
Under the action of wind load, the wake relaxation of the sling is an important problem which must be solved in the wind resistance design of a large-span suspension bridge, and at present, wind tunnel tests are the most commonly used method for researching the wind-induced vibration characteristics of the sling. The dynamic parameters of the traditional elastic suspension system simulate the actual sling can be scaled by the model, and therefore the Reynolds number effect of the model cannot be guaranteed, when the model is not scaled, the problem that the net elongation of the spring is large due to the dead weight of the model when the low-frequency suspension is to be realized cannot be realized, the low-frequency suspension cannot be realized, and the sling of the traditional elastic suspension system cannot vibrate too much when the relaxation occurs, so that the large vibration amplitude cannot be realized. Therefore, a wind tunnel test device with an elastic suspension system capable of achieving low-frequency suspension and greatly vibrating is needed, and the wind tunnel test of the independent double-sling segment model is convenient to develop.
[ utility model ]
The utility model aims to provide an independent low-frequency double-sling segment model wind tunnel test device, which solves the problems that a traditional elastic suspension system cannot realize low-frequency suspension, large-amplitude vibration and Reynolds number effect, so that the test is not easy to develop.
The technical scheme provided by the utility model is as follows: the utility model provides an independent low frequency two hoist cable section model wind tunnel test device, including be located the top frame at wind-tunnel top, hang in the first hoist cable subassembly of top frame downside, first hoist cable subassembly including connect in the first bottom frame, many first lifting ropes and many pairs of rings of top frame, the both ends of first lifting rope are through a pair of rings are connected respectively the top frame with first bottom frame.
The wind tunnel test device for the independent low-frequency double-sling segment model further comprises a second sling assembly suspended at the lower side of the top frame, the top frame comprises at least two pairs of first top beams which are arranged in parallel and at least one pair of second top beams which are arranged at the upper side of the first top beams, the first bottom frame is connected with one pair of the first top beams through a first sling, the second sling assembly comprises a second bottom frame connected with the other pair of the first top beams and a plurality of second sling ropes, and two ends of each second sling are respectively connected with the first top beams and the second bottom frame through a pair of hanging rings.
According to the wind tunnel test device for the independent low-frequency double-sling segment model, the two sets of weight pieces are oppositely arranged on the first bottom frame.
The second bottom frame comprises a first bottom beam, a second bottom beam and an index plate, wherein the first bottom beam is a pair, four end parts are respectively connected with the second lifting ropes, two ends of the second bottom beam are respectively connected with the first bottom beam which is opposite, and the index plate is fixed on the second bottom beam.
The wind tunnel test device for the independent low-frequency double-sling segment model is characterized in that a second vertical beam is arranged in the middle of the second bottom frame, the second bottom frame further comprises a bearing plate, the bottom surface of the bearing plate is connected with the top of the dividing plate, and the surface of the bearing plate is used for bearing the second vertical beam.
The second vertical beam and the index plate are eccentrically arranged.
The first sling component further comprises a first sliding mechanism, the first sliding mechanism comprises a first sliding groove and a first sliding block, the first sliding groove is formed in the first top beam in the length direction, the first sliding block is movably arranged in the first sliding groove, the first sling is connected with the first sliding block and the lifting ring, the second sling component further comprises a second sliding mechanism, the second sliding mechanism comprises a second sliding groove and a second sliding block, the second sliding groove is formed in the first top beam in the length direction, the second sliding block is movably arranged in the second sliding groove, the second sliding block is connected with the lifting ring, and the first sliding block and the second sliding block are respectively driven to move along the length direction of the first top beam so as to adjust the relative positions of the first bottom frame and the second bottom frame.
According to the wind tunnel test device for the independent low-frequency double-sling segment model, the first vertical beam is arranged in the middle of the first bottom frame, and the first vertical beam and the second vertical beam are driven to be far away from or close to each other when the first bottom frame and the second bottom frame move.
The wind tunnel test device for the independent low-frequency double-sling segment model is characterized in that the top of the first vertical beam is provided with the top flange, the bottom of the first vertical beam is provided with the bottom flange, and the first vertical beam is fixed on the first bottom frame through the bottom flange.
According to the wind tunnel test device for the independent low-frequency double-sling segment model, the bottom of the second vertical beam is provided with the bottom flange, and the second vertical beam is fixed on the surface of the bearing plate through the bottom flange.
Compared with the prior art, the utility model has the following advantages:
1. according to the wind tunnel test device for the double-sling segment model, the first bottom frame is suspended in the wind tunnel at the lower side of the top frame through the first sling component, wherein the first sling component is suspended by adopting a plurality of first sling ropes and a plurality of pairs of hanging rings, the hanging ropes replace springs in a traditional elastic suspension system, the problem of nonlinearity caused by the springs is solved, the first bottom frame can generate large-amplitude vibration, and the wind tunnel test device is similar to a pendulum structure and is based on the following conditions(g is the earth acceleration and l is the suspension length), so that the model can realize the effect of low-frequency suspension, and meanwhile, compared with a traditional suspension system, the dynamic parameters of slings in an actual bridge can be restored,the Reynolds number effect of the sling is guaranteed, the model can vibrate greatly, aerodynamic force of the model in large-amplitude vibration is obtained, and theoretical research is provided for large-amplitude phenomenon of actual engineering.
2. According to the wind tunnel test device for the double-sling segment model, the flanges are arranged in the first bottom frame and the second bottom frame, the dividing disc is arranged in the second bottom frame, the structural space positions of the independent double slings are adjusted by moving the front and back positions of the flanges on the first frame and the left and right positions of the second frame, the wind direction angle of the second bottom frame can be adjusted by rotating the dividing disc, the adjustment mode is convenient, and test data of slings under different wind direction angles are facilitated.
3. According to the wind tunnel test device for the double-sling segment model, the first sliding mechanism and the second sliding mechanism are adopted, so that the first bottom frame and the second bottom frame can move along the length direction of the first top beam, the distance between the double slings is convenient to adjust, and quantitative analysis and measurement of aerodynamic characteristics of slings under different arrangements are convenient.
[ description of the drawings ]
FIG. 1 is a perspective view of a dual sling segment model wind tunnel test device of the present utility model;
FIG. 2 is a perspective view of a top frame in a double sling segment model wind tunnel test device of the present utility model;
FIG. 3 is a partial perspective view of a second bottom frame of the dual sling segment model wind tunnel test device of the present utility model.
[ detailed description ] of the utility model
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to fall within the scope of the utility model.
Example 1: referring to fig. 1 to 3, the present embodiment providesThe wind tunnel test device comprises a top frame 1 positioned at the top of a wind tunnel, and a first sling assembly 2 suspended at the lower side of the top frame 1, wherein the first sling assembly 2 comprises a first bottom frame 21 connected with the top frame 1, a plurality of first sling ropes 223 and a plurality of pairs of hanging rings 220, and two ends of the first sling ropes 223 are respectively connected with the top frame 1 and the first bottom frame 21 through the pair of hanging rings 220. According to the wind tunnel test device for the double-sling segment model, the first bottom frame 21 is suspended in the wind tunnel at the lower side of the top frame 1 through the first sling component 2, wherein the first sling component 2 adopts a plurality of first sling ropes 223 and a plurality of pairs of suspension rings 220 to realize a suspension effect, the suspension ropes replace springs in a traditional elastic suspension system, the problem of nonlinearity caused by the springs is solved, the first bottom frame can generate large-amplitude vibration, and the wind tunnel test device is similar to a pendulum structure and is based on the following conditions(g is the earth acceleration, l is the suspension length), so that the effect of low-frequency suspension of the model can be realized, meanwhile, compared with a traditional suspension system, the dynamic parameters of slings in an actual bridge can be restored, the Reynolds number effect of slings is guaranteed, the model can vibrate greatly, aerodynamic force of the model in large-amplitude vibration is obtained, and the wind tunnel test is facilitated.
The wind tunnel test device of the independent low-frequency double-sling segment model further comprises a second sling component 3 suspended at the lower side of the top frame 1, the top frame 1 comprises at least two pairs of first top beams 11 which are arranged in parallel and at least one pair of second top beams 12 which are erected at the upper side of the first top beams 11, the first bottom frame 21 is connected with one pair of first top beams 11, the second sling component 3 comprises a second bottom frame 31 connected with the other pair of first top beams 11 and a plurality of second sling ropes 323, two ends of each second sling rope 323 are respectively connected with the first top beams 11 and the second bottom frame 31 through a pair of hanging rings 220, and two groups of sling components are arranged to obtain two different control test values.
The first bottom frame 21 is provided with two sets of counter weights 214 arranged oppositely, which are used for further enhancing the rigidity of the first bottom frame 21, and can obtain test values for suspending frames with different weights.
The second bottom frame 31 includes a first bottom beam 311, a second bottom beam 312, and an index plate 313, where the first bottom beam 311 is a pair and connects the four ends to the second lifting ropes 323, respectively, and two ends of the second bottom beam 312 are connected to the opposite first bottom beam 311, respectively, and the index plate 313 is fixed to the second bottom beam 312. According to the wind tunnel test device for the double-sling segment model, the dividing disc 313 is arranged in the second bottom frame 31, the wind direction angle of the second bottom frame 31 can be adjusted through rotation of the dividing disc 313, flexible change of the wind direction angle of the second bottom frame 31 in test is facilitated, and test data acquisition of slings under different wind direction angles is facilitated.
The middle part of second bottom frame 31 is equipped with the second vertical beam 314 of vertical setting, and second bottom frame 31 still includes loading board 315, and the bottom surface of loading board 315 is connected with the top of graduated disk 313, and the surface of loading board 315 is used for accepting second vertical beam 314, is the eccentric setting between second vertical beam 314 and the graduated disk 313, in the structural whole rigidity that does benefit to second bottom frame 31 wind direction angle adjustment, also can strengthen second bottom frame 31.
The first sling assembly 2 further includes a first sliding mechanism 22, the first sliding mechanism 22 includes a pair of first sliding grooves 221, a plurality of first sliding blocks 222 movably disposed in the first sliding grooves 221, and a first suspension rope 223 for connecting the first sliding blocks 222 to suspend the first bottom frame 21, the second sling assembly 3 further includes a second sliding mechanism 32, the second sliding mechanism 32 includes a pair of second sliding grooves 321, a plurality of second sliding blocks 322 movably disposed in the second sliding grooves 321, and a second suspension rope 323 for connecting the second sliding blocks 322 to suspend the second bottom frame 31, the first sliding grooves 221 and the second sliding grooves 321 are disposed along the length direction of the first top beam 11, and the movements of the first sliding blocks 222 and the second sliding grooves 321 respectively drive the first bottom frame 21 and the second bottom frame 31 to move along the length direction of the first top beam 11 so as to adjust the relative positions of the first bottom frame 21 and the second bottom frame 31. According to the wind tunnel test device for the double-sling segment model, the first sliding mechanism 22 and the second sliding mechanism 32 are adopted, so that the first bottom frame 21 and the second bottom frame 31 can move along the length direction of the first top beam 11, the distance between the double slings is convenient to adjust, and quantitative analysis and measurement of aerodynamic characteristics of slings under different arrangements are convenient.
The middle part of the first bottom frame 21 is provided with a first vertical beam 211 which is vertically arranged, and when the first bottom frame 21 and the second bottom frame 31 move, the first vertical beam 211 and the second vertical beam 314 are driven to be far away from or close to each other. The provision of the first and second vertical beams 211 and 314 increases the overall rigidity of the first and second bottom frames 21 and 31.
The top of the first vertical beam 211 is provided with a top flange 212, the bottom is provided with a bottom flange 213, and the first vertical beam 211 is fixed on the first bottom frame 21 through the bottom flange 213; the top of first vertical beam 211 is equipped with top flange 212, and the bottom is equipped with bottom flange 213, and first vertical beam 211 is fixed in on the first bottom frame 21 through bottom flange 213, has set up the flange in first, two bottom frames, through the structural space position of the independent two slings of position control about position adjustment around the flange on the removal first frame, the regulation mode is convenient, does benefit to the test data acquisition of hoist cable under different wind direction angle conditions.
Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. An independent low-frequency double-sling segment model wind tunnel test device is characterized in that: including top frame (1) that is located wind-tunnel top, hang in first hoist cable subassembly (2) of top frame (1) downside, first hoist cable subassembly (2) including connect in first bottom frame (21), many first lifting ropes (223) and many pairs of rings (220) of top frame (1), the both ends of first lifting rope (223) are through a pair of rings (220) connect respectively top frame (1) with first bottom frame (21).
2. The independent low-frequency double-sling segment model wind tunnel test device according to claim 1, wherein: the novel lifting rope is characterized by further comprising a second sling assembly (3) suspended at the lower side of the top frame (1), wherein the top frame (1) comprises at least two pairs of first top beams (11) which are arranged in parallel and at least one pair of second top beams (12) which are arranged at the upper side of the first top beams (11), the first bottom frame (21) is connected with one pair of the first top beams (11) through a first sling (223), the second sling assembly (3) comprises a second bottom frame (31) connected with the other pair of the first top beams (11) and a plurality of second sling ropes (323), and two ends of each second sling (323) are respectively connected with the first top beams (11) and the second bottom frame (31) through a pair of lifting rings (220).
3. The independent low-frequency double-sling segment model wind tunnel test device according to claim 2, wherein: two sets of counter weight pieces (214) which are oppositely arranged are arranged on the first bottom frame (21).
4. The independent low-frequency double-sling segment model wind tunnel test device according to claim 2, wherein: the second bottom frame (31) comprises a first bottom beam (311), a second bottom beam (312) and an index plate (313), wherein the first bottom beam (311) is a pair, four ends of the first bottom beam are respectively connected with the second lifting rope (323), two ends of the second bottom beam (312) are respectively connected with the first bottom beam (311) which is opposite to each other, and the index plate (313) is fixed on the second bottom beam (312).
5. The independent low-frequency double-sling segment model wind tunnel test device according to claim 4, wherein: the middle part of second bottom frame (31) is equipped with second vertical roof beam (314) of vertical setting, second bottom frame (31) still include loading board (315), the bottom surface of loading board (315) with the top of graduated disk (313) is connected, the surface of loading board (315) is used for accepting second vertical roof beam (314).
6. The independent low-frequency double-sling segment model wind tunnel test device according to claim 5, wherein: the second vertical beam (314) is arranged eccentrically to the indexing disc (313).
7. The independent low-frequency double-sling segment model wind tunnel test device according to claim 5, wherein: the first sling assembly (2) further comprises a first sliding mechanism (22), the first sliding mechanism (22) comprises a first sliding groove (221) arranged on one pair of first top beams (11) along the length direction of the first top beams (11) and a first sliding block (222) movably arranged in the first sliding groove (221), the first sling assembly (223) is connected with the first sliding block (222) and the lifting ring (220), the second sling assembly (3) further comprises a second sliding mechanism (32), the second sliding mechanism (32) comprises a second sliding groove (321) arranged on the other pair of first top beams (11) along the length direction of the first top beams (11) and a second sliding block (322) movably arranged in the second sliding groove (321), the second sliding block (322) and the lifting ring (220) are connected through the second lifting rope (323), and the first sliding block (222) and the second sliding block (322) are respectively driven by the movement of the second top beams to drive the first bottom frame (21) and the second bottom frame (31) along the length direction of the first bottom frame (31).
8. The independent low-frequency double-sling segment model wind tunnel test device according to claim 7, wherein: the middle part of first bottom frame (21) is equipped with first vertical roof beam (211) of vertical setting, first bottom frame (21) with when second bottom frame (31) remove, drive first vertical roof beam (211) with second vertical roof beam (314) keep away from each other or are close to.
9. The independent low-frequency double-sling segment model wind tunnel test device according to claim 8, wherein: the top of first vertical beam (211) is equipped with top flange (212), and the bottom is equipped with bottom flange (213), first vertical beam (211) are passed through bottom flange (213) are fixed in on first bottom frame (21).
10. The independent low-frequency double-sling segment model wind tunnel test device according to claim 5, wherein: the bottom of the second vertical beam (314) is provided with a bottom flange (213), and the second vertical beam (314) is fixed on the surface of the bearing plate (315) through the bottom flange (213).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322184397.1U CN220454830U (en) | 2023-08-14 | 2023-08-14 | Independent low-frequency double-sling segment model wind tunnel test device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202322184397.1U CN220454830U (en) | 2023-08-14 | 2023-08-14 | Independent low-frequency double-sling segment model wind tunnel test device |
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| CN202322184397.1U Active CN220454830U (en) | 2023-08-14 | 2023-08-14 | Independent low-frequency double-sling segment model wind tunnel test device |
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| CN (1) | CN220454830U (en) |
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- 2023-08-14 CN CN202322184397.1U patent/CN220454830U/en active Active
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